WalkawayVSP试射法正演方法研究

介绍了Walkaway VSP观测系统及Walkaway VSP地震波类型。结合模型的理论基础,以及射线理论,阐述了任意倾角多界面情况下,Walkaway VSP射线追踪模型的制作方法,论述了试射法原理。结合Walkaway VSP模型,使用 Fortran语言编写程序,实现了Walkaway VSP试射法正演模拟。利用Fortran编写的程序试算了3个模型,成功得到了任意倾角多界面情况下其射线追踪结果图和合成地震记录图,验证了程序算法的正确性和有效性。     

响应面法优化刺葡萄皮色素提取工艺参数

用正交旋转组合设计,研究了温度、时间及料液比对湘西刺葡萄皮色素(VSP)提取量的影响,利用响应面法对其提取工艺参数进行了优化.结果表明:从刺葡萄皮粉中提取色素宜采用70%乙醇(含0.03%盐酸)作为提取剂;刺葡萄皮色素提取的响应面最佳工艺条件为料液比1:16.7,提取温度46.7℃,提取时间68 min,该条件下提取量指标为8.125 9,模型预测精度达99.9%,比单因素组合条件下的提高了4.94%;回归方程优化明显提高了第一级、第二级提取率,使二级提取率由单因素最优条件下的90.18%提升到了97.35%.     

银杏营养贮藏蛋白质的电泳及细胞学研究

采用SDS-聚丙烯酰胺凝胶电泳技术和电子显微技术,对银杏不同部位的营养贮藏蛋白质组分及其动态变化规律进行了研究.结果表明,银杏营养贮藏蛋白质主要存在于枝条的皮层和木质部中;当年生枝条含量高于二年生枝条,皮层的含量高于木质部;枝条中营养贮藏蛋白质组分主要为36、32、28、23、18和15kD的蛋白质;银杏营养贮藏蛋白质的动态变化分为积累和降解两个阶段,5月中旬新叶形成后即开始积累,12月份达到最高,翌年春季降解满足芽的萌发,至4月上旬逐渐消失.     

基于陌生户问题的配送车辆调度优化模型研究

针对目前车辆调度优化模型(VSP模型)对陌生户问题的考虑不足,通过引入陌生度和陌生系数两个新的参数,改进了物流配送车辆调度优化模型,以解决陌生户问题,并采用C-W算法进行验证计算,计算结果证明了改进模型的可行性和有效性.     

Influence of cutting frequency on the morphology and the C and N reserve status of two cultivars of white clover (Trifolium repens L.)

The influence of cutting frequency was studied on white clover (Trifolium repens L.) cultivars (giant-Aran and dwarf-Rivendel) during two experiments set up under field conditions. Clover morphological and biochemical characteristics were measured prior to regrowth in response to various cutting interval treatments (1, 2, 3, 6 and 8 weeks of regrowth between two successive defoliations). The morphology of the aerial parts of the plant was described through the residual leaf area (RLA), the number of total growing points (TGP), stolon length and stolon and root dry matter productions per unit of cultivated area, as well as stolon dry weight per unit length. C and N reserve status was assessed by starch and vegetative storage proteins (VSP) concentration and amount measurements. Cutting frequency largely influenced the different variables. RLA and TGP increased in response to frequent cuttings while all other morphological and biochemical parameters decreased, with the exception of the soluble protein concentrations and protein amounts. Nevertheless, a significant difference in morphology and C and N reserve accumulation was shown between the two clover cultivars. In spite of a few number of leaves and growing points, the giant cultivar Aran showed higher C and N reserves, compared with the dwarf type Rivendel. However, the genetic expression of these differences was tightly linked to the cutting frequency applied to the sward, and was at its maximum in response to the most frequent treatments. Subjected to severe cuttings, both genotypes showed an increase in RLA and TGP, the greater effect of the treatment was obtained with the dwarf-type Rivendel. Frequent defoliations strongly reduced organic reserves but the cutting-induced decreases observed in starch and VSP contents were similar for each cultivar. Overall results confirmed that the morphological development of clover, partly defined by genetic performance, should also be controlled by cutting frequency, and highlighted a tight relationship between morphogenesis, reserve accumulation and sward management. Results are also discussed in terms of the use of C and N reserve contents as a further characterisation of white clover cultivars.     

基于节约里程法的鲜活农产品物流配送车辆路线的最优设计

根据鲜活农产品的特性和农产品的物流特性,把农产品的＂易腐＂特性和运输时间的因素结合起来,运用VSP网络图的原理和节约里程法解决鲜活农产品配送车辆路线的最优设计问题,进而达到运输成本最低的目的,提高物流运输效益。